Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-08-01
2006-08-01
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S208100, C356S243100, C702S104000
Reexamination Certificate
active
07084386
ABSTRACT:
A light source calibration target has a surface in view of a camera of an image capture system, The target includes a substrate having a substantially Lambertian surface, a visually distinct polygonal shape having corners formed on said surface so as to be visually distinct from the surface, and a plurality of objects each having an upstanding tip mounted on the surface, A method of using the calibration target operates, for each of the light sources to be calibrated, to capture an image of the target; process the captured image to derive light source calibration data and to store the calibration data.
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Bernardini Fausto
Giordano Frank P.
Gomes Jose
Rushmeier Holly
Allen Stephone B.
Harrington & Smith ,LLP
Karra Satheesh K.
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